OPERA: second neutrino tau interaction

The observation of a second neutrino tau interaction at the Gran Sasso Laboratory was announced by the OPERA Collaboration during the 25th Neutrino Conference, in Kyoto, earlier this month. This result follows on from the first observation, made in 2010.

With this new result the OPERA detector is back on track to its original motivations, after a noisy excursion over the measurement of the neutrino time of flight. The OPERA experiment was designed to search for the rare…

Editorial

Dear Readers,

There has been plenty of breaking news in physics this month; from the Nobel Prize awarded to our American colleagues, Saul Perlmutter, Brian P. Schmidt and Adam G. Riess, for their discovery of the accelerating expansion of the Universe; to the intriguing results, obtained in Europe, on the velocity of muon-neutrinos.

The neutrino velocity has been measured with unprecedented precision in the OPERA experiment…